The Kunshan WMoCu deposit in Northern Jiangxi which is located in the central area of Jiuling tungstenpolymetallic ore concentration region, is a mediumlarge scale tungstenpolymetallic deposit discovered in Dahutang area recently. Ore bodies in the form of quartz vein occur in the external contact zone between the Yanshanian porphyritic granite (~152Ma) and the low grade metamorphic rock of Neoproterozoic Shuangqiaoshan Group. In addition to porphyritic granite, there are granite porphyry veins (~136Ma) outcropped in the Kunshan deposit. In this peper, detailed studies on the petrology, geochemistry of Yanshanian intrusions and analysis of zircon Hf isotopes of porphyritic granite which is closely related to mineralization in the deposit are conducted. Both porphyritic granite and granite porphyry are characterized as high silicon (SiO2=71.35%~76.55%, 73.12%~75.15%), high potassium (K2O=3.81%~5.25%, 5.14%~6.26%), calcalkaline series of peraluminous granite (A/CNK=1.07~1.26, 1.06~1.43, and the average is more than 1.1); enrichment in LREEs, strong LREE/HREE fractionation and significant negative Eu anomalies (δEu=0.34~0.58、0.20~0.32); low zircon saturation temperatures (711~761℃ and 727~766℃ respectively), which suggest that they are both high fractional Stype granites. The εHf(t) values of porphyritic granite vary from -8.80 to 4.48 with the twostage model ages tDM2 of 917Ma to 1757Ma. It is indicated that the source region of the granite were mostly from the Neoproterozoic Shuangqiaoshan Group, and the Yanshanian magmatic activity is related to the tectonic conversion of The Lower Yangtze region in Late Jurassic. Based on the petrologic, geochronological, geochemical and NdHf isotopes characters of granites in Dahutang area, it is concluded that the Kunshan deposit has a similar magmatic evolution sequence with the Dahutang deposit which originated from the same deep magma chamber, and then intruded discontinuously after differentiation process.